Tool changer



FIG. 1 is a perspective view of the tool changer of the present design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showing in the drawing figures is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a tool changer, as shown and described. 